Safety gas-burner.



PATENTE D MAR. 3, 1903. J. B. LOUGHEAD.

SAFETY GAS BURNER. APPLICATION FILED APR. 2, 1902. N0 MODEL.

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JOHN B. LOUGHEAD, OF ELIZABETH, NEW JERSEY.

SAFETY GAS-BURN ER.

SPECIFICATION forming part of Letters Patent No. 722,027, dated March1903- Application filed. AprilZ, 1902. Serial No. 101,061. (No model.)

To (I/ZZ whom it may concern:

Be it known that I, JOHN B. LOUGHEAD, a citizen of the United States,and a resident of Elizabeth, in the county of Union and State of NewJersey, have invented a new and Improved Safety Gas-Burner, of which thefollowing is a full, clear, and exact description.

The invention relates to safety devices utilizing expansion andcontraction bars for antomatically turning off the gas in case thegasflame is accidentally extinguished.

The object of the invention is to provide a new and improved safetygas-burner which is simple and durable in construction and arranged toallow convenient turning on and off of the gas in the usual manner andto antomatically turn oii' the gas in case the gasflame is accidentallyextinguished-that is, without the operator turning ofi the gas.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corre sponding parts in all theviews.

Figure 1 is a side elevation of the improvement. Fig. 2 is a sideelevation of the lever locking the gas-cock and spring-barrel. Fig. 3 isan enlarged sectional side elevation of the gascock and parts connectedtherewith. Fig. l is an inverted plan View of the same, and Fig. 5 is anenlarged side elevation of the expansion and contraction bar and itsbearing.

The gas-cock A has its easing A secured in the usual manner to theservice-pipe B, and the gas-cock casing supports the burner O, of anyapproved construction, and also the framework D, carrying thelamp-chimney. The gas-cock A is provided with a conical plug A mountedto turn in the casing A, for turning the gas on or ofi, the motion ofthe said plug being limited by a stop-pin E, held in the casing A andadapted to be engaged by spaced shoulders or logs on a plate E, attachedto the apex end of the plug A as plainly shown in Fig. 3.

On the base end of the plug A is mounted to turn loosely a spring-barrelF, containinga helical spring G, secured at the end G to the casing Aand at its other end G to the bottom of the barrel F, the said end G2preferably projecting a distance below the bottom of the barrel andforming a pin in the path of a shoulder A on the plug A so that when theoperator takes hold of the plug-handle A and turns the plug A from aclosed position into an open position then the spring-barrel F iscarried along with the plug to wind up the spring G.

. On the under side of the spring-barrel F are formed ratchet-teeth F,adapted to be engaged by a tooth H on a lever H, fulcrumed at H on thecasing A, the free end of the said lever being engaged at one end by aspring I, attached to the casing A, and the other end of the said leverH is pivotally connected with the expansion and contraction bar J,extending upwardly through the burner-casing of the burner O and througha bracket or yoke K, secured to the upper end of the framework D,previously referred to. The nut J screws on the upper end of the bar Jand is locked in place by a jam-nut J the said out J normally resting ontop of the bracket or yoke K, as plainly shown in Fig. 1.

The device is used as follows: When it is desired to light the burner O,the operator takes hold of the handle A and gives a quarter-turn to theplug, so as to allow the gas to pass from the service-pipe B through thegascock A to the burner O, on which'the escaping gas is ignited. Theflame from the burning gas now heats the bar J, so that the latterexpands, and in doing so allows the spring I to impart a swinging motionto the lever H to engage the tooth H with one of the ratchetteeth F tohold the spring-barrel F in a locked position against the tension of itsspring G, at the same time leaving the plug A in an open position, butfree to be turned into a closed position by the operator whenever it isdesired to do so. It is understood that the operator must hold the plugA in an open position until the bar J is sufficiently expanded to allowthe tooth H of the spring-pressed lever H to engage with a ratchet-toothF, as otherwise the spring G would return the barrel F and the plug A toa normal closed position. After the lever H is swung into a lockingposition, as described, and the bar J expands farther by the heat fromthe gasflame then the bar on account of being held fixed at the lockedlever expands upwardly to lift the nut J off the lug or bracket K, (seeFig. 5,) so that the said bar J is not bent into an undesirable shape.Now in case the gasfiame is accidentally blown out then the bar J incooling contracts to finally set the nut J on the bracket K and to thenexert a pull on the lever H, so as to impart a swinging motion to thelatter to move the tooth 1-1 out of engagement with a ratchet-tooth F toallow the spring G to turn the barrel F and plug A for the latter toclose the gas-cock, and thereby shut the gas off from the burner C.

It is understood that while the plug A is in an open position and theflame is burning the operator can turn the plug into a closed positionto shut 03 the gas and extinguish the flame, so that the bar J oncooling acts on the lever H to swing the latter out of engagement withthe ratchet-tooth F to cause the spring G to turn the barrel F back toits normal position-that is, until the end G2 abuts against the shoulderA of the plug moved to a closed position by the operator. Thus the plugA can be readily opened or closed by the operator when turning the gason or 01f; but the plug is automatically turned off in case the flame isaccidentally extinguished.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. Asafetygas-burner,comprisingaspringpressedgas-cock, held normally in a closed position by the action of thespring, and adapted to be normally turned into an open or a closedposition, and an expansion and contraction device, said devicecomprising a spring-barrel loosely mounted on the plug, and having aseries of ratchet-teeth; a yoke located at the top of the burner-frame,a vertical expansion-bar supported thereby, and passing downwardlythrough the casing of the burner, and a spring-actuated lever connectedto said bar, said lever having a tooth designed to cooperate with theratchet-teeth of the barrel, when the burner is lighted, to engage andlock the barrel in the position into which it is moved against thetension of its spring as set forth.

2. A safety gas-burner, comprising a plug held normally in a closedposition by a spring attached at one end to the casing of the cook; abarrel inclosing said spring and having an aperture through which theother end of said spring extends to form a projecting pin on the outsideof the barrel, a shoulder on the plug designed to engage said pin, turnthe barrel and thereby impart tension to the spring when the plug ismoved to an open position, a series of ratchet-teeth on said barrel, aspringpressed lever having a tooth for engaging said ratchet-teeth tohold the barrel in position against the tension of the spring, anexpansion and contraction bar connected with said lever and extendingupwardly through the casing of the burner to the top of the frame, andmeans for loosely supporting said bar at its upper end, whereby afterthe lever has been moved into engagement with the barrel by theexpansion of the bar, the bar is prevented from being bentby the furtherexpansion thereof, as set forth.

3. A safety gas-burner, comprising a gascock,a spring-barrel connectedtherewith to be turned by the plug of the cock,the said springbarrelbeing provided with ratchet-teeth, a spring-pressed lever having a toothfor engaging the said ratchet-teeth, an expansion vand contraction barconnected with the said lever, and a bracket in which the said bar isfree to slide in the direction from the lever, the bracket holding thebar against bodily movement toward the lever, as set forth.

4. A safety gas-burner, having a gas-cock comprising a plug mounted toturn, a barrel loose on the plug mounted to be turned in one directionthereby, and a spring for pressing the said barrel, to return the pluginto a closed position, as set forth.

5. A safety gas-burner, having a gas-cock comprising a plug mounted toturn, a barrel loose on the plug mounted to be turned in one directionthereby, a spring for pressing the said barrel, to return the plug intoa closed position, and a retaining device for the said barrel, to holdit against return movement and allow turning of the plug into a closedposition, as set forth.

6. A safety gas-burner, having a gas-cock comprising a plug mounted toturn, a barrel loose on the plug connected with the same, to be turnedin one direction thereby, a spring for pressing the said .barrel, toreturn the plug into a closed position, and a retaining device for thesaid barrel, to hold it against return movement and allow turning of theplug into a closed position, the said retaining device comprising alever adapted to engage the barrel and hold it against return movement,and an expansion and contraction bar under the influence of the flame ofthe burner and connected with the said lever, as set forth.

7. A safety gas-burner, comprising a gascock, a barrel loosely supportedon the plug of said cock, and inclosing a spring having one end attachedto the casing of the cock,

and the other extending through an aperture in said barrel, and forminga projecting pin in the path of a shoulder on the plug, said shoulderbeing designed to engage said pin, turn the barrel, and impart tensionto the spring when the cock is opened, the said spring-barrel beingprovided with ratchetteeth, a spring-pressed lever having a tooth forengaging the said ratchet-teeth, an expansion and contraction barconnected with the said lever, and a bracket at the top of thechimney-frame, in which bracket said bar is free to move in thedirection from the lever, the bar being provided with means whereby thebracket holds it against bodily movement toward the lever, as set forth.

8. The combination with a detachable gasconnected with the other end ofsaid lever to operate.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN B. LOUGHEAD.

Witnesses:

CHAS. J. STUART, JOHN A. WALLACE.

